Ubuntu Security Update USN-5869-1: HAProxy vulnerability

[LinuxBot]

Bahruz Jabiyev, Anthony Gavazzi, Engin Kirda, Kaan Onarlioglu, Adi Peleg, and Harvey Tuch discovered that HAProxy incorrectly handled empty header names. A remote attacker could possibly use this issue to manipulate headers and bypass certain authentication checks and restrictions.

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